<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>session内置对象</title>
</head>
<body>
<h1>RequestClass = <%=request.getClass()%></h1>
<h1>ResponseClass = <%=response.getClass()%></h1>
<h1>SessionClass = <%=session.getClass()%></h1>
</body>
</html>
